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Topic review (newest first)
Just to clarify:
Now we have:
This isn't exactly clear, so let's write it in a different way:
Is that clearer?
Why does 1/(4x) = 4^-1 * x^-1? I was taught to recirpocal i.e. simply bring the bottom of the fraction to the top and change the sign of the power. Why have you split it into 4^-1 * x^-1?
(a / b) / (c / d) = (a / b) * (d / c)
in addition, could you check this (I think the book has put the answers in the wrong order)
Could you explain how to work out a fraction over a fraction?
I've never actually been taught this
Nope, you're just plugging in wrong.
I'm a little stuck again:
Thanks again, one final question, the only one left that I am unsure of my workings:
Yes, but it is normally stated in a different way, and thus involving less theorms.
in a question like y = 3x^4, do you multiply the 4 by the 3 to make dy/dx = 12x^3?
I was subtracting 1... but from +4 and not -4
On the last one, you need to subtract, not add, 1, so you get:
Hi guys and girls, long time no see. I've been away for the Christmas holidays (away from my computer at least) but now I am back to bug you with more laughably simple questions!